System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Air Cleaner Inlet Control
Code P2677: Air Cleaner Inlet Control Circuit High
Diagnostic & Technical Explanation
Code P2677 (Air Cleaner Inlet Control Circuit High) sets when the ECM detects an open circuit, a short to ground, or a short to voltage while driving the air cleaner inlet control actuator, which selects between a cold outside-air duct and a warm underhood duct or opens a second inlet for high-airflow demand. Causes are a failed inlet door actuator motor or vacuum solenoid, a binding door pivot clogged with debris drawn into the air box, or damaged control wiring near the air cleaner housing.
First-listed procedure
Rank #1
Free binding inlet door pivot
Easy DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 2 procedure(s) are in the licensed dataset. Ordering context.
Full family: Air Cleaner Inlet Control
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)